Fountain-pen.



S. GREENFIELD'.

' FOUNTAIN PEN.

' APPLICATION FILED MAR. 29, 1918.

1,300,379, 4 Patented Apr. 15, 1919.

WITNESS A TTOR/VEVS son ennnnrmnn, or NEW YORK, N. Y.

FOUNTAIN-PEN.

Specification of Letters Patent.

Patented Apr. 15, 1919..

Application filed March 29, 1918. Serial H0. 225,.

To all whom it may concern:

Be it known that I, SIMON GREENFIELD, a

citizen of the United States, residing at New York, in the county of NewYork and State of New York, have invented new and useful Improvements inFountaimPens, of which the following is a specification.

The subject-matter of this invention is fountain pens, and the principalobject of the invention is to provide a fountain-pen capable of holdingtwo different. colors of i of which a choice ma be made when it isdesired to Write, andw ich is fed in such manner as to preclude anyintermingling of the inks.

Another object of the invention is the provision of a fountain pen ofthis character having its parts so arranged that valves or closuresadapted to operate by' gravity may be incorporated in the feeding partsin such manner that when the barrel is inclined to write with one color,the flow of "the second color will be automatically stopped.

With these objects in v1ew and others, the invention resides in thedetails of construction and in the arrangement and combinationhereinafter described, defined in the claims, and shown in theaccompanying drawings, forming a part of this specification, it beingunderstood the cha ges in the precise embodiment of the inven ion hereindisclosed may be made within the scope of what is claimed withoutdeparting from the spirit of the invention. 1

In the accompanying drawings':-Figure 1 is an enlarged longitudinalsectional view through my improved fountain pen, the upper end of thebarrel being broken away.

Fi 2 is a cross sectional view, taken on the lme 2-2 of Fig. 1.

Fig. 3 is a similar view, taken on the line 33 of Fig. 1.

Fig. 4 is a still further enlarged frag-- mental sectional view,illustrating in particular the. employment of means for controlling theflow of the ink in the pen-holding? head.

ig. 5 is a cross sectional view, taken on the line 55 of Fig. 4.

Fig. 6 is an enlarged fragmental sectional view, showing the employmentof means for controlling the flow of the ink in the feeding plugs.

With more particular reference to the accompanying drawings, the numeral15 denotes the barrel portion of the pen with whic sides of theen-points in the usual way. In

which is formed an interior concentric barrel 16, in order to providethe longitudinal concentric reservoirs 17 and 18 for holding the twodifierent colors of ink. The lower ends of these barrels are open, andtheir concentric end walls are screw-threaded, the outer barrel 15 beingpreferably interiorly screw-threaded, as at 19,'while the inner barrel16 is preferably exteriorly screw-threadwith the customary shape of thestem ends of pen-points for receiving the same in back to back position.Transversely through the cross partition 24, are provided the feed ducts27 and 28, the former of which permits the inkto flowfrom the outerreservoir 17 into the cavity 25, while the latter provides a passage-wayfor the ink from the inner reservoir 18 to the'other cavity 26.

Inserted in the said cavities 25 and 26 in 3 such size and form as tocompletely fill up said cavities liquid-tight, with the exception ofsmall openings 33 and 34 extending longi-' tudinally between thepen-stems and the said lugs to provide suitable ducts through ii the inkmay pass to the underneath Fig. 1, it wi lbe noted that the integralwall 35, which separates the cavities 25 and 26,

serves as a means for holding the pens s aced from each other in back toback position so that the ink on one pen cannot intermingle withthe inkon the other pen. In-

this figure, also, it will be seen that the pens 29 and 30 together withtheir plugs 31 and 32 are inserted in their respective cavlties withtheir inner ends spaced from the cross partition 24 thereby forming inkchambers 36 and 37 in the upper ends of said cavities through which theink must pass before flowing into the ducts 33 and 34. In this of theink as before.

form of my invention, which does not include any valves or means forcontrolling positively the flow of the ink from the reservoirs to thepen-points, the relative rapidity of the flow depends partly u on thecharacter of the ink employed, alt ough the flow may be controlledsubstantially by adjusting the positions of the pens and their plugs soas to increase or diminish the size of the chambers 36 and 37. But forall general practical purposes where a pen supplying two colors of inkis needed, it will be found that, owing to the relatively small diameterof the ducts 33 and 34 in proportion to their length, the ink will notflow so freely upon the upper pen as 30 as to drop from the nib thereofwhile the lower pen as 29 is being utilized in writing.

As a means of substantially cutting ofi the flow of ink from the upperpen when it is desired to write with the lower one, I may provide, asshown in Fig. 4, the cross partition 24 with two transverse plugs 38,each provided longitudinally along one side with a feed duct 39 topermit the passage Intermediate its length each plug is also providedwith a transverse circular opening 40 opening into the feedduct 39.Seated in each opening 40 is'a ball valve 1, which is adapted to closecommunication through the feed duct 39, the wall of the duct 39 oppositethe valve seat 40 being slightly cut away in arcuate form to accommodatea sector of the ball in order to completely close communication. In thisconnection it shouldbe noted that the seats 4.0 extend outwardly towardthe circumference of the pen-holder from the said ducts 39, and thatunder this arrangement when the lower pen, assuming it to be 29asbefore, is held in position for writing,

the ball controlling the feed therefor, will drop by gravity ermittingthe passage of the ink, while the ball operating in the other plug, indropping simultaneously, closes 'its duct against the passage of ink.Conversely, when the pen-holder is turned 1 around with the position ofthe pens re- 7 versed, the ball valves, falling under the influence ofgravity, close the duct which feeds the pen 29 and opens the duct forfeeding the now lower pen 30.

Instead of. seating the ball valves in the cross partition 24, I mayprovide as best shown in Fig. 6, the feeding plugs '31 and 32,preferably near their lower ends, with openings or seats as 42, incommunication,

each with its re'spective feed duct as 33 and 34. In each. opening isseated a ball valve 41 as before, the same being adapted to close oropen its feeding duct accordingly as the pen fed thereby is above orbelow. When "i at is contemplated using ink of a poor character inthefountain pen, this last method of controlling the flow 'of the ink ispreouter longitudinal reservoir, a holding head formed with concentricflanges removably connected respectively with said concentric barrelsand having individual ink ducts for said reservoirs, feeding lugs arraned in said head longitudinally t ereof to in ividually receive andconvey the ink from said ink ducts, and means combined with said holdinghead and said feeding plugs to receive and write with either color ofink without one color intermingling with the other.

2. In a fountain pen construction, the combination of concentric barrelsformed spacedly to provide two concentric longitudinal ink reservoirs, apen-holding head formed with concentric flanges removably connectedrespectively with said concentric barrels, individual ink ducts in said.head, and means combined with said head including separated writing nibsfor individually receiving the-ink from said ink ducts.

3. In a fountain pen construction, the combination of concentric barrelsformed spacedly to provide two concentric longitudinal ink reservoirs, apenholding head formed with concentric flanges removably connectedrespectively with said'concentric barrels, individual ink ducts in saidhead, means for controlling the flow of ink through said ducts, andmeans combined with said head including separated writing nibs forindividually receiving the ink from said inkducts.

4. In a fountain pen capable of employing two colors of ink, concentricbarrels spaced apart to provide two concentric longitudi-- havingindependent cavities one for each feeding duct to open into, and meansengaged in said cavities to direct the ink therefrom withoutintermingling to separated writing nibs. v

5. In a fountain pen capable of employin two colors of ink, barrels.formed spaced apart .toiprovide two concentric longltudinal inkreservoirs, a pen-holding head formed with concentric flanges removablyconnected respectively with said concentric barrels and having a crosspartition comprising an end closure for said barrels, said partitionhaving independent ink ducts therethrough one for each reservoir; saidhead having independent cavities therein one for each feeding duct toopen into, a feeding plug engaged in each cavity to receive and conductthe ink, a valve device combined with each feeding plug to control theflow of the ink, and means including sep- 10 arated oppositely disposedwriting nibs whereby to write with the ink supplied through eitherfeeding plug.

In testimony whereof, I have signed my name to this specification.

SIMON GREENFIELD.

